Odpowiedzi

2010-03-20T19:58:21+01:00
S₅= 2*(1-2do5)/ 1-2
S₅= 2*(-31)/-1 = 62
2010-03-20T20:01:52+01:00
S5 = a1(1-q^n)/(1-q) = (2*(1-2^5))/(-1)=62